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Module 5 – Biology and Psychology of Essential Oil

The biological and psychological effects of essential oils make them a powerful tool for promoting health and wellness. However, it is important to use essential oils safely and under the guidance of a healthcare provider or certified aromatherapist.

Biology and Psychology of Essential Oil

Essential oils have both biological and psychological effects on the human body.

Biologically, essential oils contain powerful plant compounds that have antimicrobial, anti-inflammatory, ad antioxidant properties. These properties make essential oils useful for a variety of health applications, including wound healing, pain relief, and immune system support. When essential oils are applied topically or inhaled, the compounds in the oil can interact with the body at a cellular level, promoting healing and wellness.

Psychologically, essential oils can have a profound effect on mood and emotions. This is because the olfactory system, which is responsible for our sense of smell, is closely linked to the limbic system, which controls our emotional responses. When we inhale essential oils, the molecules of the oil travel to the olfactory bulb in the brain, where they can directly affect our emotions and mood.


Different essential oils have different psychological effects. For example, lavender essential oil is known for its calming and relaxing properties, while peppermint essential oil is known for its energizing and invigorating effects. Some essential oils, such as lemon and bergamot, are believed to have mood-lifting and anti-depressant effects.

  • The role of olfaction
  • Olfaction and the brain

  • Emotion and Olfaction

  • Psychotherapeutic effects of odours

  • Essential oils and stress management

Learning Outcomes

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